ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTR............................JDIM350 (Ver 2.1 Jan 2001) 1990980/0 1620000/01273822EUROPEAN PATENT APPLICATIONA320031119EP02077302.420020612EnEnEn89972520010705US20031119200347200301082003027 7F 16F 15/18 A 7F 02B 75/06 B 7B 60K 6/04 BdeVorrichtung und Verfahren zur Vibrationsdämpfung in einer Antriebsanordnung für KraftfahrzeugeenApparatus and method for smoothing out oscillations in vehicle drivelinesfrAppareil et méthode pour amortir les oscillations dans les transmissions d'un véhicule2Delphi Technologies, Inc.02643450DP-302960PO Box 5052Troy, MI 48007USFattic, Gerald T.10716 Gateway DriveFishers, IN 46038USWalters, James E.159 Red Oak LaneCarmel, IN 46033USSullivan, Michael S.305 Devonshire CourtNoblesville, IN 46060USDenton, Michael John00051983Delphi European Headquarters, 64 avenue de la Plaine de France, Paris Nord II, BP 60059, Tremblay-en-France95972 Roissy Charles de Gaulle CédexFRATBECHCYDEDKESFIFRGBGRIEITLILUMCNLPTSETRALLTLVMKROSI20031119200347

A method for and apparatus for preventing oscillations of a vehicle. The engine speed is monitored and filtered, the filtered engine speed being compared to a natural frequency of the vehicle. The natural frequency corresponds to a gear ratio of the vehicle. A torque command is provided to an electric machine (28) coupled to a driveline (16) of the vehicle, the electric machine provides a counteracting torque to the driveline in order to eliminate oscillations in the vehicle.